The objective of the study is to develop and validate a molecular diagnostic strategy (RT-ddPCR multiplex) of COVID-19 based on a saliva sample and alternative to the RT-qPCR method, in order to :

1. to compensate for the risk of a shortage of diagnostic kits, reagents and materials necessary for molecular diagnosis;
2. to increase the molecular diagnostic capacity of COVID-19 at the Rouen University Hospital;
3. and to have a method compatible with screening extended to populations at risk.

Inclusion Criteria:

• Person aged over 18 years presenting to the COVID-19 consultation of the Rouen University Hospital for screening
• Person affiliated to a social security scheme

Exclusion Criteria:

• Person objecting to participation in the research after reading information
• Person under the protection of justice,
• Person deprived of their liberty by administrative or judicial decision (guardianship, curatorship, etc.)
• Patient under guardianship or curatorship